Improvement in bran-scourers



R. TYsoN.

' Y. Bran-Sooners;

No.- 209,092. Patented 00h15; 187s.v

WITNESSES.- Y -INVEN-'ros- N4 PETERS, PHuTo-UTMOGRAPHER. WASHINGTON. D.C.

UNITED STATES PATENT OEEIcE.

ROBERT TYSON, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN BRAN-SCOURERS.

Specification forming part of Letters Patent No. 209,092, dated October15, 1878; application iiled August 9, 1878.

To all whom it may concern:

Be it known that I, ROBERT TYSON, of the city of Baltimore and State ofMaryland, have invented an Improved Machine for Removing or DetachingFlour from Bran, of which the following is a specication; and I dohereby declare that in the same is contained a full, clear, and exactdescription of my said invention, reference being had to theaccompanying drawing, and to the letters of reference marked thereon.

This invention relates to certain improvements in a machine for theabove-named purpose, wherein the operation is performed byattrition-that is to say, the Hour and bran are separated or removedfrom close contact by the action of the rapidly-movin g frictionalsurface of a part ofthe machine.

The said invention consists in means whereby the movement of theseparating or scouring device, forming a part of the machine, is to someextent prevented from being cornmunicated to the bran in contacttherewith, the object being to retard the motion -of the bransufficiently to allow of the effective scouring of the same by thefrictional surface of the separating or scouring device aforesaid.

In the description of my improved machine which follows, reference ismade to the accompanying drawin 0', forming a part hereof, and in whichFigure 1 is a`vertical section of the machine, and Fig. 2 a sectionalplan of the same.

Similar letters of reference indicate similar parts in both views. y

A is a stationary or fixed cylinder, closed at its ends, and B ascouring-drum, fitted to re= volve with the driving-shaft a therein. Thebody of the scouring-drum is covered with wire-card, leather, orbristles, or it is otherwise roughened in order to' adapt its outersurface for removing the our adhering to bran when the same is broughtin contact therewith, as hereinafter described.

The inner surface of the cylinder A is provided with radial ribs l),extending nearly to the outer surface of the scouring-drum. These ribsdivide the annular space around the scouring-drum into independentpockets or chambers, which are collectivelysupplicd with bran underpressure through a spout, C, entering the upper end of the cylinder.

To obtain the desired pressure or tension of bran within the cylinder A,the said bran is allowed to pack therein to any required height andshould the column not be sufficient when the cylinder only is lled thebran may be a1- lowed to accumulate in the conducting-spout C. Thepressure in the cylinder is regulated mainly by adjusting the size ofthe deliveryaperture D, it being furnished with a door or valve, D', forthat purpose. The conductingspout is provided with a gate, E, to preventthe pressure of bran within the cylinder at any time from reaching anundue point.

It will be understood that a thin layer only of bran is at any one timein actual contact with the scouring-drum, the remaining portion of thebran operating as an elastic packing to keep the inner layer firmly inplace. The whole or the major part of the bran dclivered to the cylinderA is, however, eventually brought into contact with and scoured by thedrum B, as the scoured portion is contin ually passing to the deliveryor discharge aperture, and its place occupied by unsecured bran from thesupply thereof acting as apack- Although it is preferred to have Jthescouring-drum revoluble and the cylinder stationary, the scourin gprocess, -as described, may be effected by revolving the cylinder arounda fixed drum. The heads of the cylinder and drum may also be used asscouring-surfaces, either with or without the co-operation ofthecylindrical surfaces of the same; but the arrangement of the machine asshown and described gives better results.

Having thus described my invention, what I claim as new, and wish tosecure by Letters Patent of the United States, is-

The cylinder A, having the radial ribs b and a conducting and a deliverypipe, each pro vided with a valve, combined with the revoluble drum B,having its outer surface covered with a rubbing material, substantiallyas and for the purpose specified.

In testimony whereof I have hereunto subscribed my name this 9th day ofFebruary, in the year of our Lord 1878.

Y ROBERT TYSON.

lVitnesses:

J AMES R. MYERS, HORACE WATERs.

